Fabricated row concrete filled steel tube structure connecting joint
By designing hemispherical nodes and vertical ring plates, the problems of difficult construction quality control and poor seismic performance of existing prefabricated steel pipe concrete structure connection nodes are solved, realizing a prefabricated connection node with reliable force transmission, convenient construction and excellent architectural effect.
Patent Information
- Application Number
- CN202520169867.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing prefabricated steel pipe concrete structure connection nodes have problems such as difficulty in controlling construction quality, indirect force transmission, and poor seismic performance. In particular, in frame structures, the columns are prone to failure while the beams are not, which can lead to the collapse of the frame structure.
The prefabricated steel pipe concrete structure connection nodes are constructed using dry construction methods. Through the design of hemispherical nodes, vertical ring plates, and transition end plates, the vertical and horizontal connections of the prefabricated columns are realized, ensuring the reliability of force transmission. Dry construction is also adopted to facilitate the adjustment of construction errors.
It improves the controllability of construction quality, reduces the damage of welding to concrete, enhances the connection strength and seismic performance of joints, avoids the defects of traditional connection methods, and achieves excellent architectural effect and convenient construction.
Smart Images
Figure CN223838358U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building structure technology, and in particular to prefabricated structures, specifically to a prefabricated steel pipe concrete structure connection node. Background Technology
[0002] The prefabricated steel pipe concrete structure connection nodes offer convenient and reliable connections, realizing the assembly concept of prefabricated structures. Modular production of the nodes allows for rapid construction, simple connections, direct and reliable force transmission, and excellent seismic performance, making them safe for use in prefabricated steel pipe concrete structures.
[0003] Existing technical solutions include:
[0004] 1) Connection nodes between the upper and lower parts of the fully precast round steel tube concrete column: The steel tube concrete column is connected by welding + local grouting or by flat plate butt joint.
[0005] 2) Connection node between circular steel tube concrete column and steel bracket: For circular steel tubes with smaller diameter, the outer reinforcing ring is welded to the steel bracket; for circular steel tubes with larger diameter, the inner reinforcing ring is welded to the steel bracket.
[0006] 3) H-beam joint and rebar connection node of hybrid beam: The concrete beam rebar is welded to the upper and lower surfaces of the flange plate of the H-beam joint.
[0007] 4) Connection nodes between floor slab and column beam: The floor slab reinforcement is not included in the beam section.
[0008] The existing technology has the following drawbacks:
[0009] a) Top and bottom connection nodes of fully precast circular steel tube concrete columns:
[0010] The contact surfaces of precast components are treated with post-cast concrete mortar, and there are many wet operations on site for local grouting, making it difficult to control the quality and greatly affecting the structural safety.
[0011] Precast components are connected by flat plates, resulting in hard contact surface to surface. Due to construction and production errors, it is difficult to achieve a tight connection, posing a significant safety hazard.
[0012] b) Connection node between circular steel tube concrete column and steel bracket:
[0013] When using an internal reinforcing ring plate for small-diameter steel pipes, it is difficult to pour concrete inside the pipe; when using an external reinforcing ring plate, the reinforcing ring plate is exposed, affecting the building's appearance and resulting in a poor building effect.
[0014] c) Connection node between H-section steel joint and reinforcing bar in hybrid beam:
[0015] The reinforcement bars of the concrete beam are welded to the H-beam joints, making it difficult to guarantee the welding quality. Welding can damage the reinforcement bars, making them prone to brittle fracture and detrimental to seismic resistance. Furthermore, the beam reinforcement bars are broken at the flanges of the H-beam joints, meaning the horizontal force cannot be directly transferred to the precast walls and columns, resulting in indirect force transmission and poor seismic performance.
[0016] d) Connection nodes between floor slabs and columns / beams:
[0017] Under earthquake loading, frame structures often collapse when columns fail but beams remain intact. The main reason for this is that the stiffness and load-bearing capacity of the frame beams increase significantly due to the reinforcement effect of the floor slabs, preventing them from forming a strong column-weak beam structure. Summary of the Invention
[0018] In view of the shortcomings of the existing technology, this utility model proposes a prefabricated steel pipe concrete structure connection node, which adopts dry operation to ensure the feasibility of node connection construction while enhancing the node connection strength.
[0019] The technical solution of this utility model is as follows:
[0020] A prefabricated steel-tube concrete structure connection node, the prefabricated steel-tube concrete structure including a steel-tube concrete shear wall, a steel-tube concrete composite column, and a hybrid beam, wherein the hybrid beam is composed of a reinforced concrete beam body and an H-beam joint, the connection node including:
[0021] The transverse connection node between the steel pipe concrete shear wall and the hybrid beam connects the steel pipe concrete shear wall and the hybrid beam in the transverse direction. The steel pipe concrete shear wall is formed by the intermittent arrangement of precast steel pipe concrete columns and the outer casing of reinforced concrete. The wall end of the shear wall is embedded with a conversion end plate for connection with the H-shaped steel joint of the hybrid beam.
[0022] A transverse connection node between a steel-concrete composite column and a hybrid beam, wherein the steel-concrete composite column is formed by encasing a precast steel-concrete composite column in reinforced concrete, and a transition end plate is embedded in the side of the composite column for connection with the H-beam joint of the hybrid beam; and
[0023] The vertical connection node of the precast steel-concrete composite column connects the upper and lower precast columns. The bottom of the upper precast column is provided with a concave hemisphere, and the top of the lower precast column is provided with a convex hemisphere. The concave hemisphere and the convex hemisphere are interlocked and welded together with a steel pipe at the joint for connection and fixation.
[0024] Preferably, the steel pipe concrete shear wall further includes vertical ring plates. At least one of the two sets of vertical ring plates is fitted onto the two precast steel pipe concrete columns at the end of the steel pipe concrete shear wall at the height of the upper and lower flange plates of the H-shaped steel joint corresponding to the hybrid beam. At least one of the vertical ring plates is welded and fixed to the transition end plate at both ends.
[0025] Preferably, both sets of vertical ring plates include a first vertical ring plate and a second vertical ring plate. The first vertical ring plate is fitted onto the first precast steel pipe concrete column at the end of the steel pipe concrete shear wall and both ends are welded and fixed to the transition end plate. The second vertical ring plate is fitted onto the second precast steel pipe concrete column at the end of the steel pipe concrete shear wall and the first vertical ring plate and both ends are welded and fixed to the transition end plate.
[0026] Preferably, the steel-tube concrete shear wall further includes a reinforcing web, and two reinforcing webs are welded together between the first precast steel-tube concrete column at the end of the steel-tube concrete shear wall and the transition end plate.
[0027] Preferably, the steel-concrete composite column further includes vertical ring plates, with each of the two sets of vertical ring plates being fitted onto the precast steel-concrete column at the height of the upper and lower flange plates corresponding to the H-shaped steel joint of the composite beam, and both ends of one vertical ring plate being welded and fixed to the transition end plate on one side; and / or, each of the two sets of vertical ring plates being surrounded onto the precast steel-concrete column at the height of the upper and lower flange plates corresponding to the H-shaped steel joint of the composite beam, and both ends of the two vertical ring plates being welded and fixed to the transition end plate on the opposite side.
[0028] Preferably, the steel-concrete composite column further includes a reinforcing web, one of which is welded between the precast steel-concrete column and the transition end plate.
[0029] Preferably, the outer edge of the concave hemisphere is welded to the inner wall of the upper precast column to form a seal;
[0030] And / or, the lower precast column is provided with a top plate at the top, and the convex hemisphere is provided on the top plate; the bottom of the upper precast column is welded and fixed to the top plate.
[0031] Preferably, the reinforced concrete beam body is provided with top reinforcement, bottom reinforcement and web reinforcement;
[0032] The web of the H-beam joint is welded with multiple T-shaped shear keys along its height. The T-shaped shear keys correspond one-to-one with the web reinforcement of the reinforced concrete beam and are welded together.
[0033] Preferably, the top and bottom reinforcing bars of the reinforced concrete beam are threaded at their ends, and the upper and lower flanges of the H-beam of the H-beam joint are provided with internal threaded channels, and the top and bottom reinforcing bars are threaded into the internal threaded channels of the upper and lower flanges of the H-beam for connection.
[0034] Preferably, the internally threaded channel passes through the upper and lower flange plates, and the threaded steel bar passes through the upper and lower flange plates and is welded to the transition end plate on the steel pipe concrete shear wall and the steel pipe concrete composite column.
[0035] The advantages of this invention compared to the prior art are as follows: This invention proposes a prefabricated steel pipe concrete structure connection node, and each connection node has the following advantages:
[0036] For the vertical connection nodes of precast steel-concrete composite columns: (1) By setting the hemispherical nodes, it can be ensured that the precast columns can move and rotate up, down, left, right and forward and backward under the premise of reliable vertical force transmission, which is convenient for adjusting construction errors; (2) The precast columns are fully precast, and the node connection is constructed using dry method, which is convenient for on-site construction and easy to control construction quality; (3) When welding steel pipes, the welding heat is transferred to the top plate and hemispherical part, which can protect the concrete from welding damage.
[0037] For the transverse connection nodes of steel pipe concrete shear wall, steel pipe concrete composite column and mixed beam: (1) By adopting vertical ring plate and using the connection of pipe and beam, the force is directly transmitted, the thickness of the vertical ring plate is reduced, which is convenient for processing and similar to the wall thickness of the steel pipe, which is easy to weld; the vertical ring plate is continuously set around the round steel pipe, and the tension of the vertical ring plate is directly transmitted to the back of the round steel pipe, which is converted into pressure on the round steel pipe. The vertical ring plate can be simply welded to the round steel pipe, avoiding the welding of the ultra-thick vertical plate to the steel pipe and the steel pipe is fully welded; (2) Compared with the ordinary round steel pipe outer reinforcing ring plate node, the vertical ring plate is set vertically, which saves node space, avoids the problem of exposed reinforcing ring plate, has a good building effect, and the concrete pouring in the node area is convenient; compared with the ordinary round steel pipe inner ring plate node, the vertical ring plate is set around the outside of the round steel pipe, and the round steel pipe is vertically continuous. Compared with the inner ring plate, it maintains the integrity and the concrete pouring is easy.
[0038] For the connection node between H-shaped steel joint and concrete beam body: (1) The upper and lower longitudinal bars are integrated with the upper and lower flange plates, which can transmit force directly, reliably and continuously, with controllable quality and low cost, avoiding the problem of difficult quality control of the lap welding of steel bars and steel plates; (2) The threaded steel bars pass through the flange steel plates and are welded with the wall column conversion steel plates, with high redundancy and convenient construction; (3) The steel bars are threaded to avoid damage to the steel bars by welding and ensure the seismic ductility of the steel bars; avoid the space requirements of weldable steel bar sleeves, and the weldable sleeves are integrated into simple steel plates.
[0039] It should be understood that the implementation of any embodiment of this utility model does not mean that it will simultaneously possess or achieve multiple or all of the above-mentioned beneficial effects. Attached Figure Description
[0040] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.
[0041] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.
[0042] Figure 1 This is a schematic diagram of the transverse connection node between the steel pipe concrete shear wall and the hybrid beam in some embodiments of this utility model;
[0043] Figure 1A for Figure 1 Schematic diagram of section 1a-1a (in a straight line);
[0044] Figure 1B for Figure 1 Schematic diagram of section 1a-1a (T-shaped);
[0045] Figure 2 This is a schematic diagram of the transverse connection node between the steel-concrete composite column and the hybrid beam in some embodiments of this utility model;
[0046] Figure 2A for Figure 2 Schematic diagram of section 2a-2a (four beam nodes);
[0047] Figure 2B for Figure 2 Schematic diagram of section 2a-2a (three beam nodes);
[0048] Figure 2C for Figure 2 Schematic diagram of section 2a-2a (two beams in a straight line at the joint);
[0049] Figure 2D for Figure 2 Schematic diagram of section 2a-2a (L-shaped joint between two beams);
[0050] Figure 2E for Figure 2 Schematic diagram of section 2a-2a (one beam node);
[0051] Figure 3 This is a schematic diagram of the vertical connection node of the precast steel-concrete composite column according to some embodiments of the present invention;
[0052] Figure 3A for Figure 3 Schematic diagram of the precast steel-concrete composite column before connection;
[0053] Figure 4 This is a schematic diagram of the connection node between the H-shaped steel joint and the reinforced concrete beam in some embodiments of this utility model;
[0054] Figure 4A for Figure 4 Schematic diagram of threading steel bars;
[0055] Figure 4B for Figure 4 Schematic diagram of the internal threaded channel in the middle flange steel plate;
[0056] Figure 4C for Figure 4 Schematic diagram of section 4a-4a.
[0057] Marked in the image:
[0058] 1. Steel-concrete composite shear wall, 2. Steel-concrete composite column, 3. Composite beam, 31. Reinforced concrete beam body, 311. Top reinforcement, 312. Bottom reinforcement, 313. Web reinforcement, 32. H-beam joint, 321. T-shaped shear key, 322. Internal threaded duct, 4. Precast steel-concrete column, 41. Upper precast column, 42. Lower precast column, 43. Concave hemisphere, 44. Convex hemisphere, 45. Top plate, 5. Transition end plate, 61. First vertical ring plate, 62. Second vertical ring plate, 7. Reinforcing web.
[0059] The same or corresponding marks in the diagram indicate the same or corresponding parts. Detailed Implementation
[0060] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of this utility model and their descriptions are used to explain this utility model, but are not intended to limit this utility model.
[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0062] It should be understood that the terms "comprising / including," "consisting of," or any other variations are intended to cover non-exclusive inclusion, such that a product, apparatus, process, or method that comprises a list of elements includes not only those elements but may also include, where necessary, other elements not expressly listed, or elements inherent to such a product, apparatus, process, or method. Without further limitation, an element defined by the phrases "comprising / including," "consisting of," does not exclude the presence of additional identical elements in the product, apparatus, process, or method that includes said element.
[0063] It should also be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device, component or structure referred to must have a specific orientation, be constructed or operated in a specific orientation, and should not be construed as a limitation on this utility model.
[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0065] This utility model relates to connection nodes in a prefabricated steel-tube concrete structure. The prefabricated steel-tube concrete structure includes steel-tube concrete shear walls, steel-tube concrete composite columns, and hybrid beams. The connection nodes include transverse connection nodes between the steel-tube concrete shear walls and hybrid beams, transverse connection nodes between the steel-tube concrete composite columns and hybrid beams, and vertical connection nodes between the prefabricated steel-tube concrete columns. All components are connected and fixed through corresponding connection nodes to form the prefabricated steel-tube concrete structure.
[0066] The present invention will now be described in detail with reference to preferred embodiments.
[0067] See Figure 1 , 1A 1B, For the steel-tube concrete shear wall 1, it is formed by the spaced arrangement of precast steel-tube concrete columns 4 and the outer wrapping of reinforced concrete. The wall end of the shear wall is embedded with a conversion end plate 5, which is used to connect with the H-shaped steel joint 32 of the hybrid beam 3 to realize the connection and fixation between the steel-tube concrete shear wall 1 and the hybrid beam 3.
[0068] The precast steel-concrete composite column 4 uses round steel pipes arranged at predetermined intervals, with vertical and horizontal reinforcing bars and horizontal tie bars tied around the perimeter, and then concrete is poured. All of these are prefabricated in the factory. The concrete inside the round steel pipes can be pre-cast in the factory or cast on site.
[0069] The transition end plate 5 is installed on the side of the shear wall end, embedded in the concrete at the wall end, and its outer surface is flush with the concrete side of the shear wall, without affecting the overall structure of the shear wall. The width of the transition end plate 5 is not less than the width of the hybrid beam 3, and the height is not less than the height of the hybrid beam 3, so as to connect the hybrid beam 3 and provide sufficient load-bearing capacity.
[0070] See Figure 2 , 2A 2B, 2C, 2D, 2E, for the steel-concrete composite column 2, it is formed by encasing the precast steel-concrete column 4 with reinforced concrete. The side of the composite column is embedded with a conversion end plate 5, which is used to connect with the H-shaped steel joint 32 of the hybrid beam 3 to realize the connection and fixation between the steel-concrete composite column 2 and the hybrid beam 3.
[0071] The precast steel-concrete composite column 4 here has the same structure as the precast steel-concrete composite column 4 in the steel-concrete composite shear wall 1.
[0072] The transition end plate 5 is located on the side of the composite column and embedded in the concrete of the composite column. Its outer surface is flush with the surface of the concrete of the composite column and does not affect the overall structure of the composite column. Similarly, the width of the transition end plate 5 is not less than the width of the hybrid beam 3, and the height is not less than the height of the hybrid beam 3, so as to connect the hybrid beam 3 and provide sufficient load-bearing capacity.
[0073] See Figure 3 , 3A For the precast steel-concrete composite column 4, it includes an upper precast column 41 and a lower precast column 42. The bottom of the upper precast column 41 is provided with a concave hemisphere 43, and the top of the lower precast column 42 is provided with a convex hemisphere 44. The concave hemisphere 43 and the convex hemisphere 44 are interlocked and connected and fixed by welding steel pipes at the joint. The convex hemisphere 44 can be a solid hemisphere or a hollow hemisphere.
[0074] The concave hemisphere 43 and the convex hemisphere 44 must have the same radius of curvature during factory processing. When installing precast columns, the convex hemisphere 44 acts as a movable hemisphere. When adjusting the installation error of the precast column, the hemisphere can fit tightly to ensure the continuity of vertical pressure transmission of concrete inside the steel pipe column.
[0075] During the specific processing and manufacturing, the outer edge of the concave hemisphere 43 is welded to the inner wall of the upper precast column 41 to form a seal, so that there will be no leakage of grout when pouring concrete into the pipe.
[0076] In a preferred embodiment, a top plate 45 is provided on the top of the lower precast column 42, and an outwardly convex hemisphere 44 is welded and fixed on the top plate 45; the size of the top plate 45 is not smaller than the size of the steel pipe of the lower precast column 42, that is, the top plate 45 completely covers and closes the steel pipe of the lower precast column 42, and after the upper and lower precast columns are connected, the bottom of the upper precast column 41 is welded and fixed to the top plate 45.
[0077] During construction, the precast column 41 is hoisted onto the top of the convex hemisphere 44, and its horizontal position and angle are adjusted. After adjustment, the round steel pipe of the precast column 41 is welded to the top slab 45. Subsequently, the precast column reinforcement is welded, and the joint area concrete is poured. The upper and lower precast columns 41 are welded together to the top slab 45 to ensure the continuity of vertical tensile, compressive, and shear force transmission of the steel pipe column.
[0078] In addition, the longitudinal reinforcement of the precast steel-concrete composite column 4 is lap-welded, and the length of the post-cast section at the splicing node of the precast component can be controlled between 200 and 300 mm, which improves the precast rate and reduces the amount of on-site construction work.
[0079] The vertical connection node for precast steel-concrete composite columns provided by this utility model has the following advantages:
[0080] (1) During construction, the movable hemisphere can move freely within the concave hemisphere at the bottom of the upper precast column to ensure vertical force transmission; the upper precast column can rotate freely on the movable hemisphere to adjust vertical errors. A thin plate with a thickness of 1-5mm can be installed under the hemisphere to facilitate adjustment of the height of the movable hemisphere. By setting the hemispherical nodes, it can be ensured that the precast column can move and rotate up, down, left, right, forward and backward on the premise of reliable vertical force transmission, which facilitates adjustment of construction errors.
[0081] (2) The precast columns are fully precast, and the node connections are constructed using dry methods, which makes on-site construction convenient and construction quality easy to control.
[0082] (3) When welding steel pipes, the welding heat is transferred to the steel plate (top plate) and hemisphere, which can protect the concrete from welding damage.
[0083] See Figure 1 , 1A 1B, In one embodiment, the steel pipe concrete shear wall 1 further includes a vertical ring plate 6, which is a steel plate arranged vertically around the steel pipe. The vertical ring plate can be bent and rolled.
[0084] Two sets of vertical ring plates 6 are provided. Since the tensile and compressive forces of the upper and lower flange plates of the H-beam joint are transmitted to the vertical ring plates 6 through the conversion end plate 5, the two sets of vertical ring plates 6 are set at the height of the upper and lower flange plates of the H-beam joint 32 of the corresponding hybrid beam 3. Each set of vertical ring plates 6 is fitted with at least one vertical ring plate 6 on the two precast steel pipe concrete columns 4 at the end of the steel pipe concrete shear wall 1. The so-called fitting means that the vertical ring plate 6 passes around the precast steel pipe concrete column 4 in an n-shape and then both ends are welded and fixed to the conversion end plate 5.
[0085] More specifically, for the steel-tube concrete shear wall 1, the vertical ring plates are connected by branch pipes, which are respectively connected to different steel pipes at different distances. As shown in 1A, two vertical ring plates 6 are provided, including a first vertical ring plate 61 and a second vertical ring plate 62. The thickness of the vertical ring plates is similar to the wall thickness of the steel pipes. The first vertical ring plate 61 is fitted onto the first precast steel-tube concrete column 4 at the end of the steel-tube concrete shear wall 1, that is, the fitting starts from the first precast steel-tube concrete column 4 at the relatively close end of the steel-tube concrete shear wall 1, enclosing the first precast steel-tube concrete column 4 and welding it. The second vertical ring plate 62 is fitted from the second precast steel-tube concrete column 4 at the relatively far end of the steel-tube concrete shear wall 1, simultaneously enclosing the second precast steel-tube concrete column 4 and the first vertical ring plate 61 and welding them. Both ends of the first vertical ring plate 61 and the second vertical ring plate 62 are welded and fixed to the transition end plate 5.
[0086] See also Figure 1 , 1A The steel pipe concrete shear wall 1 also includes a reinforcing web 7. In the figure, two reinforcing webs 7 are set between the first steel pipe concrete precast column 4 and the transition end plate 5 at the end of the steel pipe concrete shear wall 1, and both ends are welded together. The reinforcing webs enable the vertical shear force of the hybrid beam to be transferred to the steel pipe in the shear wall.
[0087] See also Figure 2 , 2A Similar to the steel-concrete composite shear wall 1, the steel-concrete composite column 2 also includes vertical ring plates 6, with a thickness similar to that of the steel pipe wall. Two sets of vertical ring plates 6 are installed at the height of the upper and lower flange plates of the H-shaped steel joint 32 of the corresponding hybrid beam 3, and each is fitted onto the precast steel-concrete composite column 4 by a single vertical ring plate 6 and welded thereon. For the steel-concrete composite column 2, the vertical ring plates are connected by beams, with different vertical ring plates directly connected to the central circular steel pipe. The arrangement of the vertical ring plates 6 varies depending on the hybrid beams 3 connected to the periphery of the steel-concrete composite column 2.
[0088] like Figure 2AThe steel-concrete composite column 2 is connected to the mixed beam 3 on all four sides. The steel-concrete composite column 2 is equipped with a transition end plate 5 on all four sides. The four vertical ring plates 6 are in pairs. The two vertical ring plates 6 enclose the steel-concrete precast column 4 from opposite sides, and the two ends of each pair of vertical ring plates 6 are welded and fixed to the transition end plate 5 on the opposite side.
[0089] like Figure 2B The steel-concrete composite column 2 is connected to the hybrid beam 3 on three sides. The steel-concrete composite column 2 is provided with transition end plates 5 on three sides. Two vertical ring plates 6 surround the precast steel-concrete column 4 from opposite sides, and the two vertical ring plates 6 are welded and fixed to the transition end plates 5 on opposite sides at both ends. Another vertical ring plate 6 passes around the precast steel-concrete column 4 in an n-shape, and its two ends are welded and fixed to the transition end plates 5 on the corresponding sides at both ends.
[0090] like Figure 2C The steel-concrete composite column 2 is connected to the mixed beam 3 on both sides. The steel-concrete composite column 2 is provided with the transition end plate 5 on both sides. Then, the two vertical ring plates 6 surround the steel-concrete precast column 4 from the opposite sides, and the two ends of the two vertical ring plates 6 are welded and fixed to the transition end plate 5 on the opposite side.
[0091] like Figure 2D The steel-concrete composite column 2 is connected to the hybrid beam 3 on two adjacent sides. The steel-concrete composite column 2 is provided with the transition end plate 5 on two adjacent sides. Then, the two vertical ring plates 6 are wrapped around the steel-concrete precast column 4 in an n-shape, and the two ends are welded and fixed to the transition end plate 5 on the corresponding side respectively.
[0092] like Figure 2E The steel-concrete composite column 2 is connected to the hybrid beam 3 on only one side. The steel-concrete composite column 2 has a transition end plate 5 on one side. Then, a vertical ring plate 6 passes around the precast steel-concrete column 4 in an n-shape, and its two ends are welded and fixed to the transition end plate 5 respectively.
[0093] Similar to the steel-concrete composite shear wall 1, the steel-concrete composite column 2 also includes a reinforcing web 7. A reinforcing web 7 is set between the precast steel-concrete column 4 and the transition end plate 5, and is welded and fixed to the center of the precast steel-concrete column 4 and the transition end plate 5.
[0094] It should be noted that the thickness of the reinforcing web is 10mm, while the wall thickness of the steel pipe inside the shear wall is only 4-5mm. The two are not compatible, so two reinforcing webs are designed inside the shear wall, each with a thickness of 6mm, to match the steel pipe inside the shear wall. The wall thickness of the steel pipe inside the composite column is 10mm, which matches the 10mm thickness of the reinforcing web, so only one is needed.
[0095] This utility model uses a vertical ring plate to connect the steel pipe and the conversion end plate. This connection method transmits force directly and is easy to process. The vertical ring plate is changed from a traditional thick plate to multiple single-layer thin plates. The thickness of the thin plates is similar to that of the steel pipe wall, which facilitates welding. The vertical ring plate is continuously arranged around the round steel pipe. The tension of the vertical ring plate is directly transmitted to the back of the round steel pipe and converted into pressure on the round steel pipe. The vertical ring plate can be easily welded to the round steel pipe, avoiding the steel pipe from being fully welded when welding an ultra-thick vertical ring plate to the steel pipe.
[0096] The transverse connection node between the steel-tube concrete shear wall, the steel-tube concrete composite column, and the hybrid beam provided by this utility model has the following advantages:
[0097] (1) The vertical ring plate adopts the connection of pipe and beam, which directly transmits force, reduces the thickness of the vertical ring plate, facilitates processing, and is similar to the wall thickness of the steel pipe, which is convenient for welding. The vertical ring plate is continuously set around the round steel pipe, and the tension of the vertical ring plate is directly transmitted to the back of the round steel pipe, which is converted into pressure on the round steel pipe. The vertical ring plate can be simply welded to the round steel pipe, avoiding the welding of the ultra-thick vertical plate to the steel pipe and the steel pipe being fully welded.
[0098] (2) Through design calculations, the bearing capacity and stiffness of the vertical ring plate are required to be no less than those of the ordinary round steel pipe reinforcing ring. Compared with the ordinary round steel pipe outer reinforcing ring plate node, the vertical ring plate is set vertically, saving node space, avoiding the problem of exposed reinforcing ring plate, resulting in better architectural effect and convenient concrete pouring in the node area; compared with the ordinary round steel pipe inner ring plate node, the vertical ring plate is set around the outside of the round steel pipe, and the round steel pipe is vertically continuous. Compared with the inner ring plate, it maintains the integrity and makes concrete pouring easier.
[0099] See also Figure 4 , 4A According to 4B and 4C, this utility model provides a preferred hybrid beam structure, wherein the hybrid beam 3 includes a reinforced concrete beam body 31 and an H-shaped steel joint 32.
[0100] The reinforced concrete beam body 31 is a precast reinforced concrete structure, with top reinforcement 311, bottom reinforcement 312 and web reinforcement 313, as well as stirrups, and is formed by pouring concrete.
[0101] H-beam joint 32 is 100-200mm in length and uses H-beams, which have upper and lower flanges and webs. Steel plates can be welded to the transition end plate 5 of the steel-concrete composite shear wall 1 and the transition end plate 5 of the steel-concrete composite column 2. For example, two connecting steel plates can be symmetrically welded. Bolt holes are pre-set on the steel plates, and they are connected and fixed to the web of the H-beam with several bolts.
[0102] In a preferred embodiment, such as Figure 4CAs shown, multiple T-shaped shear keys 321 are welded along the height of the web of the H-beam. The web of the T-shaped shear key 321 is perpendicular to and welded to the web of the H-beam. The flanges of the T-shaped shear key 321 face outward and correspond one-to-one with the web reinforcement 313 of the reinforced concrete beam body 31 and are welded to it. The precast concrete is connected to the H-beam joint through the T-shaped shear keys.
[0103] In a preferred embodiment, such as Figure 4 , 4A As shown in Figure 4B, the upper and lower flanges of the H-beam joint 32 correspond to the top reinforcing bars 311 and bottom reinforcing bars 312 of the reinforced concrete beam body 31, and the ends of the top reinforcing bars 311 and bottom reinforcing bars 312 of the reinforced concrete beam body 31 are threaded. The upper and lower flanges of the H-beam joint 32 are provided with internal threaded channels 322, and the top reinforcing bars 311 and bottom reinforcing bars 312 are inserted into the internal threaded channels 322 of the upper and lower flanges of the H-beam, and are connected by threads.
[0104] Preferably, the internally threaded channels 322 opened on the upper and lower flange plates pass through the upper and lower flange plates, and the threaded steel bars pass through the upper and lower flange plates and are welded to the transition end plates 5 on the shear wall and composite column.
[0105] The H-shaped steel joint and concrete beam connection node provided by this utility model have the following advantages:
[0106] (1) The upper and lower longitudinal bars are integrated with the upper and lower flange plates, which can transmit force directly, reliably and continuously, with controllable quality and low cost, avoiding the problem of difficult quality control of the lap welding of steel bars and steel plates.
[0107] (2) The threaded steel bars pass through the flange steel plate and are welded to the wall column conversion steel plate, which has high redundancy and is convenient to construct;
[0108] (3) The longitudinal reinforcement of the hybrid beam is connected in the factory, avoiding the on-site reinforcement binding work of ordinary composite beams. No steelworkers are required on the construction site of the hybrid beam.
[0109] (4) The joint area is wrapped with steel mesh and cast-in-place concrete, which provides excellent corrosion resistance and fire resistance.
[0110] (5) Threading the reinforcing bars avoids damage to the reinforcing bars during welding and ensures the ductility of the reinforcing bars in earthquake resistance; avoids the space requirements of weldable reinforcing bar sleeves, and weldable sleeves are fused into simple steel plates.
[0111] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.
Claims
1. A prefabricated steel-concrete composite structure connection node, the prefabricated steel-concrete composite structure comprising a steel-concrete composite shear wall, a steel-concrete composite column, and a hybrid beam, wherein the hybrid beam is composed of a reinforced concrete beam body and an H-beam joint, characterized in that, The connection node includes: The transverse connection node between the steel pipe concrete shear wall and the hybrid beam connects the steel pipe concrete shear wall and the hybrid beam in the transverse direction. The steel pipe concrete shear wall is formed by the intermittent arrangement of precast steel pipe concrete columns and the outer casing of reinforced concrete. The wall end of the shear wall is embedded with a conversion end plate for connection with the H-shaped steel joint of the hybrid beam. A transverse connection node between a steel-concrete composite column and a hybrid beam, wherein the steel-concrete composite column is formed by encasing a precast steel-concrete composite column in reinforced concrete, and a transition end plate is embedded in the side of the composite column for connection with the H-beam joint of the hybrid beam; and The vertical connection node of the precast steel-concrete composite column connects the upper and lower precast columns. The bottom of the upper precast column is provided with a concave hemisphere, and the top of the lower precast column is provided with a convex hemisphere. The concave hemisphere and the convex hemisphere are interlocked and welded together with a steel pipe at the joint for connection and fixation.
2. The connection node according to claim 1, characterized in that, The steel pipe concrete shear wall also includes vertical ring plates. At least one of the two sets of vertical ring plates is fitted onto the two precast steel pipe concrete columns at the end of the steel pipe concrete shear wall at the height of the upper and lower flange plates of the H-shaped steel joints corresponding to the hybrid beam. At least one of the vertical ring plates is welded and fixed to the transition end plate at both ends.
3. The connection node according to claim 2, characterized in that, Both sets of vertical ring plates include a first vertical ring plate and a second vertical ring plate. The first vertical ring plate is fitted onto the first precast steel pipe concrete column at the end of the steel pipe concrete shear wall and both ends are welded and fixed to the transition end plate. The second vertical ring plate is fitted onto the second precast steel pipe concrete column at the end of the steel pipe concrete shear wall and the first vertical ring plate and both ends are welded and fixed to the transition end plate.
4. The connection node according to claim 2, characterized in that, The steel-tube concrete shear wall also includes a reinforcing web, and two reinforcing webs are welded together between the first precast steel-tube concrete column at the end of the steel-tube concrete shear wall and the transition end plate.
5. The connection node according to claim 1, characterized in that, The steel-concrete composite column also includes vertical ring plates. Two sets of vertical ring plates are fitted onto the precast steel-concrete column at the height of the upper and lower flange plates of the H-shaped steel joint corresponding to the composite beam. Both ends of one vertical ring plate are welded and fixed to the transition end plate on one side. And / or, two sets of vertical ring plates are surrounded onto the precast steel-concrete column at the height of the upper and lower flange plates of the H-shaped steel joint corresponding to the composite beam. Both ends of the two vertical ring plates are welded and fixed to the transition end plate on the opposite side.
6. The connection node according to claim 5, characterized in that, The steel-concrete composite column also includes a reinforcing web, one of which is welded between the precast steel-concrete column and the transition end plate.
7. The connection node according to claim 1, characterized in that, The outer edge of the concave hemisphere is welded to the inner wall of the upper precast column to form a seal; And / or, the lower precast column is provided with a top plate at the top, and the convex hemisphere is provided on the top plate; the bottom of the upper precast column is welded and fixed to the top plate.
8. The connection node according to any one of claims 1 to 7, characterized in that, The reinforced concrete beam is provided with top reinforcement, bottom reinforcement and web reinforcement; The web of the H-beam joint is welded with multiple T-shaped shear keys along its height. The T-shaped shear keys correspond one-to-one with the web reinforcement of the reinforced concrete beam and are welded together.
9. The connection node according to claim 8, characterized in that, The top and bottom reinforcing bars of the reinforced concrete beam are threaded at their ends. The upper and lower flanges of the H-beam of the H-beam joint are provided with internal threaded channels. The top and bottom reinforcing bars are threaded into the internal threaded channels of the upper and lower flanges of the H-beam joint.
10. The connection node according to claim 9, characterized in that, The internally threaded channel passes through the upper and lower flange plates, and the threaded steel bar passes through the upper and lower flange plates, and is welded to the conversion end plate on the steel pipe concrete shear wall and the steel pipe concrete composite column.